EP0517645A1 - Verrou pour un boulon pour assembler un couteau dans une tondeuse et un dispositif à couteau avec ce verrou - Google Patents

Verrou pour un boulon pour assembler un couteau dans une tondeuse et un dispositif à couteau avec ce verrou Download PDF

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Publication number
EP0517645A1
EP0517645A1 EP92610042A EP92610042A EP0517645A1 EP 0517645 A1 EP0517645 A1 EP 0517645A1 EP 92610042 A EP92610042 A EP 92610042A EP 92610042 A EP92610042 A EP 92610042A EP 0517645 A1 EP0517645 A1 EP 0517645A1
Authority
EP
European Patent Office
Prior art keywords
bore
shaft
catch
knife
designed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP92610042A
Other languages
German (de)
English (en)
Inventor
Jorn Freudendahl
Laurits Rasmussen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JF-FABRIKEN - J FREUDENDAHL AS
Original Assignee
JF-FABRIKEN - J FREUDENDAHL AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JF-FABRIKEN - J FREUDENDAHL AS filed Critical JF-FABRIKEN - J FREUDENDAHL AS
Publication of EP0517645A1 publication Critical patent/EP0517645A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/73—Cutting apparatus
    • A01D34/733—Cutting-blade mounting means
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/73—Cutting apparatus
    • A01D34/736—Flail type

Definitions

  • the invention relates to a catch for a shaft for mounting a knife in a mower in which the axis of the shaft extends transversely through a first member rotatable about a transverse axis and comprising a spring biassed member designed to engage with a recess in the shaft in order to keep the shaft firmly against displacement in its longitudinal direction.
  • the invention further relates to a knife assembly comprising a first member rotatable about a transverse axis and a catch according to the invention.
  • Another prior catch for use in mounting a knife in a mower is a conventional screw nut. It is, however, desirable to have a catch that is easily and quickly released without the use of special tools in order to detach the knife for exchange.
  • the catch according to the invention differs from the prior art in that it includes a second member with two intersecting bores with mutually skew axes, that the first bore receives the spring biassed member and a spring for biassing said member in the direction towards an abutment and towards an opening at one end of the first bore, and that the second bore is designed to receive the shaft.
  • a catch is thus obtained which may be released by merely passing a slender member, such as a nail or a thin pin, through the opening at said one end of the first bore and urges the spring biassed member backwards out of engagement with the recess in the shaft.
  • the first bore has two parts with mutually different diameters whereby the transition between the two parts forms said abutment and the spring biassed member has a section extending into the bore part with a small diameter. This provides for obtaining a good guidance of the spring biassed member within the bore.
  • the opening in said one end of the first bore of the catch faces away from the rotational axis of the first member.
  • said opening by the centrifugal force is kept free of earth, vegetable components and the like.
  • the second member of the catch has opposite lateral faces facing substantially tangentially in relation to the rotation of the first member and said lateral faces converge in relation to each other in the direction away from the first member. The second member then exerts a lifting effect on material mowed by the mower.
  • FIG. 1 show a knife assembly in the form of a knife disc 1 known per se of a disc mower and a knife 2.
  • This knife is by means of a bolt 3 pivotally secured to the knife disc 1 which has a rotational axis O perpendicular to the plane of Fig. 1.
  • Bolt 3 is retained by means of a catch 4 according to the invention.
  • Catch 4 is constituted by a member 5 with two bores 6 and 7, the first bore 6 having two parts 6a and 6b with a relatively small and a relatively large diameter, respectively. Bore 6 is continuous with an opening 14 at the end of part 6b while bore 7 extends from the interface towards knife disc 1 and past bore 6 without being continuous.
  • the two bores 6 and 7 are positioned so as to engage with each other whereas their axes are mutually skew.
  • a member 8 with two cylindrical sections whose diameters substantially correspond to the diameters of the two parts 6a and 6b of bore 6 so that member 8 may slide into bore 6 is received in bore 6.
  • Member 8 is actuated by a spring 9 in the direction towards part 6b with the small diameter, whereby the shoulder 10 of member 8 at the transition between the two sections of member 8 is made to abut on the corresponding shoulder 11 at the transition between the two parts 6a and 6b of bore 6.
  • the bore part 6a with the large diameter is preferably closed by an appropriate plug 17.
  • the shaft of bolt 3 has a circumferential recess 12 which, as shown in Fig. 2, is located so that it is on a line with bore 6 when the knife is mounted.
  • Knife 2 When knife 2 is to be mounted on knife disc 1, member 8 is urged backwards against the force of spring 9 by means of a pin 13, a nail or another slender member to be found in any ordinary tool box. The section of member 8 with the large diameter is thus removed from bore 7 and bolt 3 may be fully inserted. Member 8 is then released and spring 9 passes it forwards so that shoulder 10 abuts on shoulder 11. The section of member 8 with the large diameter is thereby passed into recess 12 of bolt 3, thereby preventing said bolt from moving in its longitudinal direction, whereas it is firmly locked. Knife 2 may be dismounted in a corresponding manner.
  • the opening 14 of bore part 6a faces away from the rotational axis 0 of knife disc 1. In operation this provides for obtaining that the centrifugal force keeps earth, vegetable matter and the like out of bore 6 so that opening 14 does not get blocked whereby the lock may be operated without hindrance.
  • member 5 has lateral faces 15 and 16 extending substantially radially in relation to knife disc 1, i.e. in operation they are directed substantially tangentially in relation to the rotation of the knife disc. Said lateral faces 15 and 16 converge in relation to each other in the direction away from knife disc 1, whereby in operation they exert a lifting effect on the mowed material.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)
EP92610042A 1991-06-06 1992-06-09 Verrou pour un boulon pour assembler un couteau dans une tondeuse et un dispositif à couteau avec ce verrou Withdrawn EP0517645A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK107791A DK107791A (da) 1991-06-06 1991-06-06 Laas for en aksel til montering af en kniv i en slaamaskine og et knivaggregat omfattende en saadan laas
DK1077/91 1991-06-06

Publications (1)

Publication Number Publication Date
EP0517645A1 true EP0517645A1 (fr) 1992-12-09

Family

ID=8100745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92610042A Withdrawn EP0517645A1 (fr) 1991-06-06 1992-06-09 Verrou pour un boulon pour assembler un couteau dans une tondeuse et un dispositif à couteau avec ce verrou

Country Status (2)

Country Link
EP (1) EP0517645A1 (fr)
DK (1) DK107791A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6834486B2 (en) 2003-03-12 2004-12-28 Vermeer Manufacturing Company Pivotal knife mounting arrangement
EP1588599A1 (fr) * 2004-04-21 2005-10-26 Lely Enterprises AG Dispositif faucheur, adaptateur de couteau pour un tel dispositif faucheur, et dispositif de retenue pour un tel dispositif faucheur
US7490459B2 (en) 2003-03-12 2009-02-17 Vermeer Manufacturing Company Mowing device, a knife adapter for such a mowing device and a retainer for such a mowing device
EP2165589A1 (fr) * 2008-09-22 2010-03-24 Deere & Company Mécanisme de porte-couteau
EP3888441A1 (fr) * 2020-03-30 2021-10-06 Andreas Stihl AG & Co. KG Barre de coupe pour une tondeuse à gazon et/ou une motofaucheuse, tondeuse à gazon et/ou motofaucheuse et procédé de montage d'une barre de coupe et/ou d'une tondeuse à gazon et/ou d'une motofaucheuse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2058347A1 (de) * 1970-11-27 1972-06-15 Stockey & Schmitz Maehrotor fuer Rotormaeher
AT353527B (de) * 1974-02-22 1979-11-26 Kuhn Sa Futtermaehmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2058347A1 (de) * 1970-11-27 1972-06-15 Stockey & Schmitz Maehrotor fuer Rotormaeher
AT353527B (de) * 1974-02-22 1979-11-26 Kuhn Sa Futtermaehmaschine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6834486B2 (en) 2003-03-12 2004-12-28 Vermeer Manufacturing Company Pivotal knife mounting arrangement
US6959530B2 (en) 2003-03-12 2005-11-01 Vermeer Manufacturing Company Pivotal knife mounting arrangement
US7490459B2 (en) 2003-03-12 2009-02-17 Vermeer Manufacturing Company Mowing device, a knife adapter for such a mowing device and a retainer for such a mowing device
US7743478B2 (en) 2003-03-12 2010-06-29 Vermeer Manufacturing Co. Method for changing knives in a mower
US7966795B2 (en) 2003-03-12 2011-06-28 Vermeer Manufactruing Company Mowing device, a knife adapter for such a mowing device, a retainer for such a mowing device and method of using same
EP1588599A1 (fr) * 2004-04-21 2005-10-26 Lely Enterprises AG Dispositif faucheur, adaptateur de couteau pour un tel dispositif faucheur, et dispositif de retenue pour un tel dispositif faucheur
EP2165589A1 (fr) * 2008-09-22 2010-03-24 Deere & Company Mécanisme de porte-couteau
US7703268B2 (en) 2008-09-22 2010-04-27 Deere & Company Rotary cutter bar mechanism and blade pin coupling
EP3888441A1 (fr) * 2020-03-30 2021-10-06 Andreas Stihl AG & Co. KG Barre de coupe pour une tondeuse à gazon et/ou une motofaucheuse, tondeuse à gazon et/ou motofaucheuse et procédé de montage d'une barre de coupe et/ou d'une tondeuse à gazon et/ou d'une motofaucheuse

Also Published As

Publication number Publication date
DK107791D0 (da) 1991-06-06
DK107791A (da) 1992-12-07

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